"Yun Fei, do you really want to invest in the Yanhuang engine of the 810 Research Institute?" The next day, it was already afternoon after Yun Fei woke up, and since lunch, Cheng and Ma Fengshan were waiting for Yun Fei in Yun Fei's room with a stern face from time to time.

In the morning, they had already seen the test number of Yanhuang engines, and this result was far from what they had imagined.

China is on the verge of success in this regard, but it is not entirely successful.

The stable results in the ground test do not mean that the high-altitude platform test and the flight test can obtain a stable result. Especially the primitive real yàn number jù here, which made Ma Fengshan's heart very heavy. The high-altitude test is not a flight test, and the two months of the Yanhuang engine test here and the scrapping of three samples, sudden stalling and other failures often occur.

After the two of them told Yun Fei about these situations, they quietly waited for Yun Fei's decision.

"In this way, it is difficult for the Yanhuang engine to fail to succeed in a year?" Yun Fei's face also became very ugly.

"It's not that it can't be successful, it's very difficult. During the flight, the working environment of the engine is far more complex than that of the engine fixed on the high-altitude platform, and there will be more ...... failures," Cheng said quietly through gritted teeth.

ARJ-21 aircraft, they planned to be like the Yun-10 aircraft, just to make a prototype for static pressure testing, and the second prototype for flight testing, after all, Ma Fengshan summed up the aircraft structure calculation method is definitely the best calculation method in the world. Sample costs alone can be reduced to a minimum.

Hundreds of millions of dollars can be saved here.

But not now, the technical performance of the engine is not good, and the long test of 10,000 hours is only a cumulative time. And not one engine that has been tested for such a long time.

"Has the high-altitude platform test been completed in 1,000 hours?" Yun Fei asked through gritted teeth.

"No, there are three in a row, and the longest test time is the current one, which has been tested for a total of 754 hours so far......," Cheng said with a shake of his head from time to time. If they could complete a thousand hours of high-altitude testing, the performance of the engine would not have changed much, and they would not be as worried as they are now.

"What is the reason for the scrapping of the first three stations?" If it really can't be done, Yun Fei will have to have a backup plan - to cooperate with the Ukrainians.

"The main thing is that the blades are broken. Some of the technologies and process materials used in the turbofan eight of the Yanhuang engine have also been improved, but practice has proved it. The improved design of these engines was not successful, perhaps it would be easier for them to build the engine of the mainline airliner than to make this new small-thrust engine, after all, there is a turbofan eight base there......" Ma Fengshan sighed.

This is a hard wound for the whole of China.

"Isn't their impeller production process a monolithic high-temperature sinter? And then the whole forging is carried out? "Guocheng Blade Factory is a factory specializing in the production of this thing. Yun Fei naturally knows these things.

"It's the process that is used. According to the analysis, the main reason is that the pressure of the forging equipment is not enough, coupled with the accuracy problem of machining, the four-axis processing of the 132 factory is to achieve the fifth axis function through guò tooling, which is still slightly different from the real fifth axis...... "Hou Mingrui, who had just entered the door, said with an ugly face.

Yun Fei was speechless for a moment.

The biggest problem is not because of the material, but because of the accuracy of machining.

Things come back to the five-axis machining center again, how can Yun Fei not be depressed?

"How was the turbofan eight machined in the first place?" When I think of the original turbofan-8, it has already gone through 150 hours of airworthiness flight. Why didn't the turbofan 8 encounter these problems at the beginning, but now Yanhuang has encountered them?

"At that time, the impellers of turbofan eight were all processed by the former Soviet Union. Instead of machining and subsequent surface treatment in our own country. After all, the former Soviet Union produced these engines by special aircraft, and now Lao Maozi produces engines and exports them to China, which are all equipment left by the former Soviet Union. Our plan in China at that time was that if the turbofan 8 was successful, we would install a set of equipment dedicated to the production of engine turbofans without obtaining a high-performance machining center......" Hou Mingrui explained to the crowd.

The Soviet Union produced these precision equipment, often using such a special machine production method.

Such a production line is specially designed and developed for the production of a certain product with very high precision requirements, which is not only costly, but also does not have flexibility, and after the product adjustment, most of the entire production line is scrapped.

This is also the reason why the former Soviet Union was able to be dragged down because of a space program by the United States. All the energy of the whole country has been invested in the production of these high-precision and cutting-edge heavy industries, and there has not been enough energy and material resources to invest in the light industry related to the people's livelihood, and as a result, they have been able to build the International Space Station, and even prepare to build a base on the moon, while the people in their country are living in poverty.

After the old man came to power, relations with the international community became better, and the whole country was already poor, and the international situation was not as complicated as it was in the seventies, so it was naturally impossible to continue such a costly and inefficient mode of production.

Since then, China has been vigorously introducing CNC machine tools and CNC technology with lower production costs and higher production efficiency, rather than trying to develop the special machine production model that dragged down the huge former Soviet Union.

"So how did Europe and the United States do it before the advent of five-axis machining centers?" Yun Fei was poisoned by the idea that material is king.

"The birth of CNC machine tools is because of the aviation industry, and after the European and American countries have high-precision high-end CNC machine tools, the development of jet fighters and passenger aircraft has begun to get faster and faster. Materials and manufacturing go hand in hand...... "Huang Qiaosong has a special say in this.

Materials, although China is much worse than foreign countries, but there is no problem in manufacturing the most basic aero engines.

"In that case, let's pay 150 million to the 810 Research Institute, Director Hou, there's no problem with producing another batch of test samples with this money, right?" Jiuyi Heavy Industry's five-axis machining center is about to face the market, and if there is still a problem, then Yunfei will not hesitate to give up this project.

The loss is only 150 million.

And if it succeeds, it will naturally have more benefits.

You must know that the price quoted by Pratt & Whitney for one engine is equivalent to more than 13 million yuan, and the sample production of Yanhuang engine is only 10 million, and the production cost of mass production of these engines will be lower.

"There is no problem, absolutely no problem." Hou Mingrui didn't expect that Yun Fei, the guy who was extremely slamming in Huang Qiaosong's mouth, would actually have 150 million in one mouth. You know, he thought that Yun Feimax would only give them tens of millions of funds at the beginning......

"Yun boy, how about the processing of this batch of turbines, turbofan discs, and blades in the actual yàn workshop of your Jiuyi Research Institute? After all, your equipment is the best in the country, and the technology of the workers is basically the top...... "Huang Qiaosong is used to taking advantage of Yunfei, and when he heard that he wanted to re-produce engine samples, if he gave these businesses to Yunfei, whether it was the test workshop of the Jiuyi Research Institute or to Xin Kaixing, he could save tens of millions of processing costs.

In particular, Guocheng Yunfei's blade factory, which has a general equity, itself is specialized in the production of this thing.

"There is no problem, but let's say it first, one yard is one yard, no research funding can't be said, now that we have funding, we have to follow the rules of the market." Whether it is the production and processing of my Jiuyi Research Institute's test workshop or Xinkaixing Impeller Factory, I will directly deduct this processing fee from these research funds......" Yun Fei's words suddenly made Huang Qiaosong feel like he had eaten a fly, and the smile on his face suddenly froze.

Yun Fei didn't care about his reaction, and he couldn't always be a good person, right?

You can't owe yourself a debt, can you? The money was given anyway, and if the 810 Research Institute is still doing it like the 132 Factory and the 611 Research Institute, it will be itself that suffers in the end.

"Ma Lao, this matter is so decided, anyway, it will take almost eight months for our ARJ-21 final assembly, the first prototype used to do static compaction will be made first, and if the domestic progress is not good, let's find a way." We have it in our country, and no matter how bad it is, we will not lose our dignity. After Huang Qiaosong and Hou Mingrui left, Ma Fengshan, who had always had a gloomy face, was about to say something, but Yun Fei directly blocked his words.

He really didn't want to be blackmailed by those foreigners anymore.

"In the United States, you've all seen how those grandchildren treat us. This qiē is because we don't have it in China. If Yun 10 is not left behind, and Turbofan 8 continues to invest in research, will we be discriminated against like that? Do they dare to do that to us? In front of foreigners, can we have the slightest dignity to talk about? Yun Fei sighed, this matter, he just wanted to take a breath.

"Dignity is earned by oneself, not something that can be bought with money!" Regarding Yun Fei's statement, Ma Fengshan and Cheng Bu both thought deeply of it.

Especially Ma Fengshan, his time in the United States is not short.

Even though many Americans admire him very much, they are disrespectful, because even if he has the highest talent in the whole world, in the eyes of those Americans, this talent is for nothing. (To be continued......)